Guard or buffer for trunk-pistons or the like.



K. BARKHAM. GUARD OH. BUFFER FOR TRUNK PISTONS OR THE LIKE.

APPLIMTION FILED F3314, 1914.

Patentad June 2, 1914.

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UNITED smarts PA -rica KARL or sou'rnaiarron, :anatnnn;

GUARD on nurrnca iron ritunx-risroiis run specification of LettersPatent.

A'piilication filed February M, ill-la. Serial No. $18,770.

Patented dune Efiltilld.

To all whom it concern Be it known that I, KARL n h-mm, engineer asubject of the King of Great Britain,

resi ing borough of'Southampton, Hants, England,

at. 99 Bugle street, in the county have Invented. certain new andusefullmprovements in Guards or Bufiers for Trunk- Pistons and the like,of which the following the outermost end of trunk pistons, plungers, andthe like, when the said pistons or plungers are not in their properworking positions in the engines or machines which they may form partof. This device will protect the outermost end of the said pistons andthe like from coming into violent contact with the connectingrod or itsuivalent, through the said piston being a le to V swing. beyond itsproper working position,

when as before described the piston is not i in its proper'workingposition in the cylinder of the machine which it mayformipart of, orwhen the outermost end of-the connectingrod or its equivalent isdisconnected from its proper working position, and so allows the rod tocome into contact with the piston as aforesaid.

I will describe my invention as ap lied to the trunk piston of aninternal com ustion engine. I In the accompanying drawmgs I have .shownwhat I consider to be the best means of carrying out my invention, inwhich Figure l is a cross sectional view of my improved guard or butler.Fig. 2 an outside elevation of same, viewed from bottom. w

"On the drawings Fig. 1 shows the guard as fixed to the lower oroutermost end of a piston.

. In carrying out my invention, I provlde a guard or bufier A, which mayconsist of one or more parts, which ma be madeof metal or other suitablemateria or materials. The guard or buffer A, will be placed inside thelower or outermost end of the piston B,

and will be suitably fixed there for thetime it is required to remain inthat position. The guard or buffer will be of suitable size result: Iprovide a metal ring A of ant. shaped'section. The footof the, l. (C)will prmect outward. The vertical part of the ring A, which is at rightan les to the foot C. of same, will normally, e' ;a little greater H1diameter than the inside of the platen B. A suitable small portion ofthe ring A will be cut out or removed as in an ordinary piston ring (Don drawing),

This will allow of the ring ,A, being,com-

pressed inward to a smaller diameter, and Wlll also allow the ring A toenvelop the connecting rod when required to do so;

The ordinar 1 method of using the device will hens followsz-Taking itthat the piston B. 1s about to be removed from its cylinder, upon theoutermost end of the piston I B. being withdrawn. from the cylinder to acertain extent, the l. shaped ring A. will be passed over theconnecting-rod, and the upper or vertical art of the said ring will bepushed into t 1e outermost end of the piston B, the cut D in the ring A.as before described allowing it to be compressed to the required extentto allow of this being done- The expansion will cause it to remainthere. The lower part 0. of the ring A. will be of greater diameter thanthe outside of the piston l3. Thus it will not be possible to push thering in beyond the required position, and also 1t will not bePOSSl-blGlJO replace the outermost end of "the piston B. in

the cylinder again until the ring or guard A. is removed. Further :thelower part O.

of the ring or guard A. being of greater diameter than the outside ofthe piston B. it will serve toprotect the outside of same, and it willalso protect the base of the piston B. from injury 'so long as it is inposition. The ring A. being new in position as above described willprotect the piston B. from injury through the connecting rod coming intoviolent contact with same owing to the piston B. swinging on its gudgeonpin or hinge. The ring or guard can remain in this pbsition until thepiston is replaced in the cylinder again. When this is done, asaforesaid, the lower end of the guard be ing of greater diameter thanthe piston, will not allow the said guard to be accidentally left in thepiston.

Althou h I have described this guard as being made in ascertain manner,and of certainmaterials, the same may be made of any suitable materialor materials, and the guard to the plungers of air compressors, pumps;

and the like.

Having thus described my invention, What i I claim as new therein, anddesire to secure by Letters Patent is 1. A guard or butter for use ontrunk pistons comprising a ring adapted to be removably fitted upon theopen end of the piston in concentric relation thereto.

2. A guard or buffer for use on trunk pistons comprising a ring adaptedto be removably fitted upon the open end of the piston in concentricrelation thereto and having an angular cross section.

3. A guard or bufier for use on trunk pistons comprising a splitresilient ring adapted to be removably fitted upon the open end of thepiston in concentric relation thereto and having an L-shaped crosssection.

4. A guard or buffer for use on trunk pistons comprising a splitresilient ring adapted to be removably fitted upon the open end of thepiston in concentric relation thereto and having an Lshaped crosssection, the cylindrical portion of the ring fitting Within the pistonand the fiat portion of the ring projecting across the end face of thepiston.

In testimony whereof I have hereunto set 'my hand in presence of twosubscribing'witnesse's.

KARL BARKHAM.

Witnesses:

FREDERICK J. CHEESBROUGH, JOHN A. BROANHEAD.

